Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92d60d2bde5634bcd38f53f2b19e3caf3f31a338790fc869ded85fee10a0d9dc' 
  AND token = 'AeC+ljlJTxwos4sOG5ByBc2S/fi+a1e8HndXxXEC9Jg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}